|Year|Best|Location|Date|World rank|
|---|---|---|---|---|
|2012|27:02.59|Birmingham|22 June|3rd|
|2011|26:43.16|Brussels|16 September|1st|
|2009|26:46.31|Berlin|17 August|1st|
|2008|26:25.97|Eugene, Oregon|8 June|1st|
|2007|26:46.19|Brussels|14 September|1st|
|2005|26:17.53|Brussels|26 August|1st|
|2004|26:20.31|Ostrava|8 June|1st|
|2003|26:49.57|Paris|25 August|4th|

Question: how many runs are there?
Answer: 8